I have 2 favorite bookmarklets.
The first is Double Back
It backs up 2 pages unless there's insufficient history, then it backs up 1 if possible:
I wrote Double Back to fill in the gap between right clicking the back button to
get a list of pages, and hitting the back button twice. Either way you're in the
position of hitting the back button 2 or more times to go back only 2 pages.
For some reason every backup button in the world overlooks the "backup
2 pages case." If there aren't 2 pages in the history then it tries to back up
one page so you don't feel like you clicked it for nothing!
The second is Mod
which attempts to display the last modification date
of the current page:
some sites won't allow this function, producing a blank dialog.
Sometimes the results are obviously flawed(January 1, 1970)
but it works on some sites and works in Google Chrome 5 Beta
(unlike SRWare Iron which showed blank on every page I tried.)
Can come in handy when reading a review that doesn't have a date
on the page, or some such similar scenario. Better 'n nuthin'